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Master Electrician Dad Quizzes Sons about Aluminum+Copper Wires in a Commercial Building, Thoughts?

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Video by Hendy The Sparky

Hendy The Sparky

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This video clarifies a critical electrical wiring code restriction: 4/0 aluminum wire is generally not permitted for commercial electrical services, even for conversions from residential properties. The content explains that aluminum wire is typically restricted to residential applications, while commercial projects require copper wire, often of larger gauges, to meet safety and code requirements.

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Okay, can we use four alt aluminum for a 200 amp service at this church? >> No. Correct, we cannot. [music] Why? Why can't we use four alt aluminum? Cuz it's commercial rated. It's commercial rated, right. So, we got to make sure we don't use that exception. So, that's why we ran 300s, actually 350s for a 300 amp service, right? We don't use that aluminum rule in commercial. Did you know that? I'm sure you did.

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